﻿using B.Z.BasicData.Domain.Entity.Authorize;
using Microsoft.Extensions.Configuration;
using Microsoft.IdentityModel.Tokens;
using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;

namespace Common
{
    public class JwtTools
    {
        public string JwtNewString(IConfiguration _configuration, T_User user) 
        {
            //2.生成JWT
            //Header,选择签名算法
            var signingAlogorithm = SecurityAlgorithms.HmacSha256;
            //Payload,存放有害信息，下面我们放了一个用户Id
            var claims = new[]
            {
               // new Claim(ClaimTypes.Role,"admin")
                new Claim(JwtRegisteredClaimNames.Sub,user.Id.ToString()),
                new Claim(ClaimTypes.Name,user.UserName),
                new Claim(ClaimTypes.NameIdentifier,user.Id.ToString()),
                new Claim(ClaimTypes.Email,"zhangsan@example.com"),
                new Claim(ClaimTypes.Role,"Admin"),
                new Claim("CustomClaimType","CustomValue"),
                new Claim("key","value值")
            };
            //Signature
            //取出私钥并以UTF8编码字节输出
            var secretByte = Encoding.UTF8.GetBytes(_configuration["Authentication:SecretKey"]);
            //使用非对称算法对私钥进行加密
            var signingKey = new SymmetricSecurityKey(secretByte);
            //使用HmacSha256来验证加密后的私钥生成数字签名
            var signingCredentials = new SigningCredentials(signingKey, signingAlogorithm);
            //生成Token
            var Token = new JwtSecurityToken(
                    issuer: _configuration["Authentication:Issuer"],            //发布者
                    audience: _configuration["Authentication:Audience"],        //接收者
                    claims:claims,                                              //存放的用户信息
                    notBefore:DateTime.UtcNow,                                  //发布时间
                    expires:DateTime.UtcNow.AddDays(1),                         //有效期设置为1天
                    signingCredentials                                          //数字签名
                );
            //生成字符串Token
            var TokenStr = new JwtSecurityTokenHandler().WriteToken(Token);
            return TokenStr;
        }
    }
}
